Hormones Part III: Optimal Levels of Cortisol, Insulin and Thyroid are Essential to Vibrant Health: „Cortisol secretion is promoted by the presence of even the tiniest bit of light. This is why it is so important to sleep in a room that is completely dark with no alarm clock glowing in the dark. Researchers did a study of one hundred subjects who were placed in a completely dark room with the exception of a pin point of light on the back of their knees. Cortisol levels rose in each subject as a result.“

Welcome!
This photonblog.de contains weblinks to topics I am interested in with regard to light, color and health. This blog is a kind of personal logbook and therefore the entries often do not contain pictures or comments. Sometimes, when I have the time and words come easy, a luxurious entry occurs. Personally, I use this blog as a thesaurus via the search functionality.
--------------------------------------------------